SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13e3728fd4906e47993feaf8c58d4880b79e5011164e2437af30968ac90b0af4' 
  AND token = 'mMOWJLPLfWSOnQYPOStWZ2d/OLFpPToFH9e3jKH2rrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables